INTRODUCTION We report a case of a 67-year-old male who presented with a cecocentral scotoma caused by a septic embolus from subacute bacterial endocarditis (SBE). METHODS A 67-year-old man presented with sudden, painless decreased vision in the left eye. A dilated fundoscopic exam, Humphrey visual field test, transthoracic echocardiogram, abdominal computed tomography (CT), and blood culture...

EXAMINATION of the central visual fields on the Bjerrum screen is easily and accurately carried out when fixation is perfect owing to sparing of the macula. Frequently, however, it is desirable to estimate the central and paracentral fields when the fixation area has been affected. This cannot be done satisfactorily unless the eye which isbeing examined is accurately immobilized. Reed (1960) en...

Telescope magnification causes a ring scotoma (blind area) around the magnified view, which has been suggested as a hazard when bioptic (spectacle-mounted) telescopes are used for driving. Preliminary work in our lab suggests when viewing binocularly on simple plain backgrounds, people can use the fellow (non-bioptic) eye to detect objects in the ring scotoma area (known as bi-ocular multiplexi...

The human visual system is normally very good at determining the relative positions of objects in space, but under certain conditions contextual influences can cause significant errors in this process. We studied spatial localization around an artificial scotoma, a small mask that occludes part of the visual field while a dynamic pattern is shown over a surrounding region, and found that the ab...

30. Kabsch.-ThQse de Wiirzburg, 1891. 31. Knapp.-Arch. f. OphthaI., XIV, p. 255, 1868. 32. Lang.Trans. Ophthal. Soc. U.K(., XXIX, p. 156, 1909. 33. Lawford and Edmunds -Trans. O,hthal. Soc., U.K., VII, p. 208, 1886. 34. Idem.-St. Thomas's Hosp. Rek5., XI, p. 171. 1886. 35. Leber.-Graefe-Saemisch Handbuch, V, p. 907, 1877. 36. Leber u. Deutschmann.-Arch. f. Ophthal., XXVII, i, p. 2 72, 1881. 37....

PURPOSE To investigate the correlation between reading speed and scotoma size in patients with subfoveal occult with no classic choroidal neovascularization (CNV) in age-related macular degeneration (AMD) participating at 2 of 28 centers in the Verteporfin in Photodynamic Therapy trial. DESIGN Prospective, observational case series. PARTICIPANTS Twenty-two eyes of 22 patients with occult wi...

OBJECTIVE To evaluate the ability of the fellow eye to detect stimuli in the area corresponding to the ring scotoma (blind area) of a monocular bioptic telescope in simple conditions (conventional perimetry) and in more visually demanding conditions. METHODS A computerized dichoptic perimeter enabled separate stimuli to be presented to each eye of 7 bioptic users and 7 nonusers. The bioptic r...

-The alteration of contrast sensitivity function (C.S.F.) is known in Parkinson’s disease. The aim of this study is to determine if this alteration is present at early stages of the disease. Methods.Twelve parkinsonian patienls under dopatherapy and at early stages of the disease and twelve control subjects were tested. The C.S.F. test consisted of presentation on a high resolution. snap scanni...